Electric water heater



PM Jan. 13,1927.

UNITED STATES 1mm 1. nurse, or MILWAUKEE, wrscousm.

ILIC'IBIO WATER. HEATER.

Application fled February 15, 1828. Seriallo. 88,440.

This invention relates to electric water heaters.

Objects of this invention are to provide an electric water heater of acirculatin type through which the water passes, an to so construct theheater that the water .will pass both inside and outside of the heaterin a continuous flowin' stream, thus exposing the maximum sur ace forheating the water and adapting the heater to continuous heating of thestream of flowing water.

. Further objects areto provide an electric heater which is soconstructed that the heating unit closes one end of the water 'acket ortube and forms a portion thereof w en it is in position, and to soorganize the parts of the heater that the heating unit may be mostreadily withdrawn and replaced or repaired as needed. i

Further objects are to provide a very simple and sturdy type of electricwater heater, which may be constructed very cheaply, and which may beeasily installed.

An embodiment of the invention is shown in the accompanying drawings,inwhich Figure 1 is an elevation of the heater part= may be made of anydiameter or length ly in section and with parts broken away.

Fi re 2 is a transverse sectional view on the hue 2-2 of Figure 1.

' The heater comprises an outer shell or g jacket 1 which has anelongated metal tube provided with a pipe receiving fittin 2 atits'discharge end. referably this tu welded or brazed thereto anfannularrin or flange 3 at its inner end. It is provide with an elbow pipe 4adjacent its inner end which may be connected bymeans to a-union 5 witha pipe 6 extending from the T-fitting 7 which is threaded .to the watersupply e heating unit coigprises an enclosing shell 9 which has weld orbrazed thereto a relative hea flange or washer 10 at its inner end thees 3 and 10 being apertured and fasten together b means of screws orbolts 11, a suitable gas et 12 bein interposed if-desir'ed. The innerportion 0? the heating unit consists of a pipe 13 and the outer end ofthe heating unit is closed by means of an annular plate 14.

The resistance element of the heating unit ma be constructed in anysuitable manner an is interposed between the shells 9 and 13, asillustrated in the drawing. The terminals of the resistance unit areconnected '2 into the receiving pipe.- I

.electric heater for afcirculating stream of has 7 to the terminalmembers 15, which project through an insulating end washer 16 carriedwithin the shell 9, as shown most clearly in Fi re 1.

It is to .be articularly noted that the inner tube 13 o the heatinelements continues outwardly and is screwe into the T-fitting 7.

In operation, the incomin water asses from the supply pipe 7 into t ecentra pipe 13 and also a portion of this stream of water is by-passedby the pipes 6 and 4 and.

passes between the outer shell 1 and the' shell 9 of the heatingelement, the two streams finally discharging from the fitting Inrenewing or repairing the heating elements, it is merely necessary toloosen the unit 5 and thereafter to unscrew the pipe 13 from the T 7,the screws or bolts 11 being removed to facilitate its 0 ration.Thereafter the heating unit ma withdrawn bodily from the outer she Iandmay be repaired or replaced as desired.

It will be seen that;a very simple type of water has been provided andthat this unit as required by the particular type of service for whichit is installed. 7

Although the invention has been described in considerable detail, it isto be understood that the same may be variously embodied and istherefore to be limited only. as

claimed.

I claim 1. An electric water heater comprisin an outer casing having aclosed end provi ed with a delivery pipe and having an open .end, aninlet pi e leading into said outer casing adjacent its open end, asupply pipe projecting into said casing throng its open end and o eninginto said casing in proximity to tlie closed end of the casing, animbedded electric heater surrounding said last mentioned pipe, ashellsurrounding said 1 heater and forming therewith a unit, and a flangeclosing the open end of said casing and surroun ing sai shell, wherebyan annular water chamber is formed about said heater, and a centralwater chamber passes 105 through said heater, the pipe which enters saidcasing being connecte to said supply pipe.

2. An electric water heater, comprising an annular heating unit havingvan inner and an outer casing with the inner casing openermost casing ata point adjacent the flange. ing completely therethrough, a flange car-In testimony that I claim the :loregoing ried by said heater and ofannular shape, a I have hereunto set my hand at Milwaukee, 10

' casing having an open end removably held in the county of Milwaukeeand State of to said flange and having a delivery end, and Wisconsin.

a supply glpe opening into the central casing of sai heater and openinginto the out- NORBERT F. STRAUSS.

